Check out my community page for the wiring details of this pack kzbin.infocommunity
@michaelwahl56694 жыл бұрын
Thank you for the video. I usually add a fillet of heat gun glue between each pair of cells before soldering. That not only prevents the cells from flopping around while soldering, it also gives the pack additional structural integrity during a crash.
@WhirlyBloke4 жыл бұрын
I've done that in the past. But now I rely on the capon tape cos it's less messy and probably stronger.
@Enderkruemel3 жыл бұрын
I always use a little(!) Drop of hotglue to secure the cells togeter also to solder them togeter i use tinned solderwick(very thick one)as a wire connection.
@rzijl683 жыл бұрын
Great idea! Just a tiny drop between each cell would be more than enough. Next time I'll do that :)
@BryonGaskin5 ай бұрын
That was the absolute best visual on how to do this. Doing a flat pack should be how people learn how to do this (provided they don't already have a good idea). As soon as you stack the them on top of one another it gets more complex (if you don't understand the logic of the wring)
@WhirlyBloke4 ай бұрын
Thanks for the great feedback. 👍
@100SteveB4 жыл бұрын
I recently used 8 of those cells to make a nice 4s pack for one of my fixed wings. They weigh less than a 4s lipo pack. I got about 25 minutes flight time with the lipo. With the li-ion pack i am getting well over an hour. Less weight with more than double the range. They are ideal for fixed wings and cruising style quads.
@WhirlyBloke4 жыл бұрын
They make awesome packs.
@mickelson83323 жыл бұрын
Just the ticket mate, you always give great tuition. Clear, concise, no messing about. Just how we like it. Cheers, Mick, New Forest.
@WhirlyBloke3 жыл бұрын
Thanks
@DavidChavez-sj5bq3 жыл бұрын
This is a nice execution on the build, and a good example to follow. However, for those of you just learning how to DIY your own packs as I was when I stumbled across this video, the most important decision you make is what cell you select. Whirlybloke does mention he chose the Panasonic 18650B cell because he just happened to have some extra in his possession. He does indicate that they have a low current rating and also posts the info on the data sheet in the video description. Whirlybloke falls short of discouraging the use of these batteries for drone applications. To put it simply, the Panasonic 18650B is the wrong cell choice if you want your drone to actually fly. I was heavily influenced because he made this pack for a crocodile 7, which I own. I was also in the process of researching how to build my own Li-ion packs for long range. It seemed exactly what I was looking for, so I built 4 packs. Through some test flights I discovered the batteries were overwhelmed by the current demands of just maintaining a hover. The cells experienced severe voltage sag and the drone was underpowered and dropped to the ground. All packs I made are useless for flying and will be for you too, if you use the Panasonic cells. If you intend to make your own pack, look into the sony VTC5A, or Sony VTC6 cells, which are probably the best balance of capacity and IR. They are the same cells that Auline uses for their Li-ion packs. Whirlybloke, as someone in a position to influence peoples decisions in the FPV hobby, you do have a responsibility to provide accurate information. I suggest you make it clear that there are better battery choices, and that the Panasonic 18650B is a poor choice for drone applications. The only reason I chose this cell is because of your video. I'm not the only one that has made this same mistake, as I've had direct communication with another victim of your influence.
@WhirlyBloke3 жыл бұрын
Agreed, but I did make the point these were cells that I happened to have anyway. The best choice is the VTC6 variant of the 18650 that I covered in this video kzbin.info/www/bejne/pZ_CimhtptCtb5Y
@_tyrannus6 ай бұрын
For anyone reading this now - Molicel cells are the best at high discharge and high capa, if you can find and afford them. Their P50B 21700 releasing this year is absolute science fiction, with a rated 45 A continuous discharge (
@scootroter48594 жыл бұрын
I made two of those 3400mah 3s batteries, not 6s...well, because I could care less about long range flying! Lol I made them out of $1 Li-ion cell phone batteries I found on Clearance sale from a China website. I made them for my QX7! Cost me about $6 each due to the fact I found out you have to have some goop that's made so you can solder to aluminum! Cuz you normally can't solder to it! Anyway, a great and easy project for long life batteries for my Taranis! 😎 🤘
@WhirlyBloke4 жыл бұрын
Awesome. Thanks for watching.
@dividingbyzerofpv67484 жыл бұрын
I settled on the Sony VTC5D for what appears to be the highest amp rating of any 18650s I can find. Might be 2800mah but I am building 6s2p for use on 7in or even a pair for my 13in for 11200mah. I figure my 6s2p packs are good for 30amps continuous and around 60amps burst rating. Pack weight for 6s2p is 645g and yields 23min flight times cruising at 15-19amps on 2806.5 1300kv Avengers and HQ 7040x3 props. AUW 1350gs with Hero 7 Black on a Project 399 frame. The 13in I am not really ready to talk about but about to move to an 8s4p pack.
@WhirlyBloke4 жыл бұрын
Sounds interesting
@B_dev3 жыл бұрын
This would be better than the one shown in the video, but I doubt this would be safe; just about every lipo can output at least 100 amps, while the cells in the video only output 5.
@padysrini99553 жыл бұрын
Beginner. Have seen a few videos, all were ok. But the voice over here truly helped. One suggestion - if you can put a slide of ALL parts used, it will help beginners like me place orders easier. Cheers.
@WhirlyBloke3 жыл бұрын
Noted!
@dcdk15257 ай бұрын
Thanks 4 an insightful viD Mr., greets from Denmark
@WhirlyBloke5 ай бұрын
You are very welcome
@AngryPepper19642 жыл бұрын
Wow, fantastic video Whirly Bloke, I’ve been wanting to make a 6s for long range on my GepRC Crown CiniWhoop, I do believe I’ve found my perfect instructional video. Thanks very much👍👍
@WhirlyBloke2 жыл бұрын
I recommend using Sony VTC6 or equivalent 18650 cells. You'll get 3000mAh with a max 20A current. They're about the best power per dollar.
@AngryPepper19642 жыл бұрын
@@WhirlyBloke Oh that’s perfect, thank you very much for that.
@QuadDamageFPV4 жыл бұрын
Tidy work, demystifying the Li-ion. Thanks 👍
@WhirlyBloke4 жыл бұрын
Thanks for watching.
@geordieboy773 жыл бұрын
would love to see a field pack DIY video
@Fpvfreaky4 жыл бұрын
Can’t wait to see what quad your using it for now 👍🏽😁
@WhirlyBloke4 жыл бұрын
😀Thanks for watching.
@Fpvfreaky4 жыл бұрын
Whirly Bloke thanks for posting 👍🏽
@Couacc4 жыл бұрын
Excellent tutorial Lets hope there is a 2nd part ( Efficiency Test) Thanks
@WhirlyBloke4 жыл бұрын
On its way. Thanks for watching
@edit66194 жыл бұрын
I have done some li ion packs and have found that the Sony VTC6 3000mAh 20A 18650 cells the best for flight time as the NCR18650B cells have a higher resistance and quite a lot of the energy is being wasted and have a shorter flight time. I really think you would be shocked with the flight time difference in real work flying.
@WhirlyBloke4 жыл бұрын
Yep, I agree. There's is a quite a bit of difference between the different manufacturers 18650 cells. - Panasonic NCR18650B 3400mAh IR 55mOhm - Sony vtc6 18650 3100mAh IR 13mOhm - Sony vtc5a 18650 2500mAh IR 9.8mOhm VTC6 looks to be the best compromise of internal resistance and energy. I've got some on order. The NCR18650 cells I used were just what I had kicking around looking for a use. Thanks for the info and thanks for watching.
@TomasLomba4 жыл бұрын
Have you tried the samsung 30Q or the Sanyo-panasonic ones?
@undeze2 жыл бұрын
Nice wiring diagrams. Thanks
@TLK223 жыл бұрын
Nice channel! I just bought a Iflight Chimera 7 and couldn't find a lithium ion pack that was big enough. I will try building my own!
@WhirlyBloke3 жыл бұрын
Go for it.
@rahulpathania782 жыл бұрын
Awesome.. this video is one of it's kind.
@WhirlyBloke2 жыл бұрын
Thanks.
@lucianofpv42763 жыл бұрын
My next project, brilliant! Thank you for this I need long range batteries for my 8" and I think I can accomplish this with your video
@WhirlyBloke3 жыл бұрын
Nice.
@MatzeMaulwurfАй бұрын
I also have an 8 incher. But my drone is only 5“
@adampinkerton80913 жыл бұрын
Great tutorial as usual Dave, very neat job. Love the label. Cheers mate
@WhirlyBloke3 жыл бұрын
Thanks.
@MrPaulielie4 жыл бұрын
Nicely done man looks professional 👍keep it up cheers 🍻
@WhirlyBloke4 жыл бұрын
Thanks, will do!
@HolaACchillin3 жыл бұрын
Very nice! 💯🔥🔥🔥
@dpxfpv3 жыл бұрын
Man this looks so professional
@WhirlyBloke3 жыл бұрын
Thanks.
@josephbove74774 жыл бұрын
Totally awesome! That's all that needs to be said.
@WhirlyBloke4 жыл бұрын
Thanks for watching.
@josephbove74774 жыл бұрын
@@WhirlyBloke You're welcome. Love the channel.
@calmarcalmar Жыл бұрын
thank you very much!
@WhirlyBloke Жыл бұрын
You're welcome!
@LineAnimation4 жыл бұрын
Professional build as always.
@WhirlyBloke4 жыл бұрын
Thanks. and thanks for watching.
@TAMINO.3 жыл бұрын
Thank you so much for this Video! Also the very detailed description is very useful! I'm looking forward to maybe build one of these things! :)
@WhirlyBloke3 жыл бұрын
Go for it, but just take care and wear safety goggles.
@TAMINO.3 жыл бұрын
@@WhirlyBloke Yes, thanks!
@mauxx914 жыл бұрын
Great video. I'm waiting the batteries to make my own 6s lion packs. I've ordered the Samsung INR 3000mah 30Q That should have 20amp and a low internal resistance similar to the Sony vt50 I've red on other comments. Let's see how they will perform! Plan is to use those packs on 7inch quad and into an ar 900 fixed wing.
@WhirlyBloke4 жыл бұрын
Thanks. Let me know how it goes. Thanks for watching.
@alistairmorton4974 жыл бұрын
Nice video!!!
@WhirlyBloke4 жыл бұрын
Thanks for watching.
@jlarson424 жыл бұрын
Very informative and helpful video. Thanks 🤓
@WhirlyBloke4 жыл бұрын
Thanks for watching and the feedback.
@dronepilot260rc3 жыл бұрын
Thanks for this informative video!
@WhirlyBloke3 жыл бұрын
Glad it was helpful!
@Steve-O_FPV4 жыл бұрын
Subbed on this for sure. Thanks man, good vid. Gonna do this right away.
@WhirlyBloke4 жыл бұрын
Thanks for the sub!
@rzijl683 жыл бұрын
I've discovered that there is also a 21700 type Li-Ion battery, that would be ideal as it is just between 1 and 2 packs of 18650 cells. It then weighs less then 2 of these packs, while delivering somewhere around 4000 mAh of current.
@WhirlyBloke3 жыл бұрын
Nice. I've been using the VTC6 recently which are very good.
@mamoshimamoshian90784 жыл бұрын
Hi :) I love your video's thank you for sharing, but this one is really hard to follow specially with the balance lead. I know I have to find some info some where else, but I was hoping this video was enough. But no matter what. I am Grateful for the good work you are doing....:)
@WhirlyBloke4 жыл бұрын
You can do it!
@MrNams3 жыл бұрын
How much current we can draw? How much time it takes to recharge?
@AnnieTheBean4 жыл бұрын
Another awesome video
@WhirlyBloke4 жыл бұрын
Glad you enjoyed it
@redscorpion2010193 жыл бұрын
хорошее видео! Мне понравилось. все просто и понятно! Спасибо!
@WhirlyBloke3 жыл бұрын
Спасибо за просмотр.
@CRUZROYHelicopters3 жыл бұрын
could you do a 6s pack with wiring but using 12 18650 batteries......thanks
@trevorimpulsebuyguy63984 жыл бұрын
That is a great idea!
@WhirlyBloke4 жыл бұрын
Thanks for the feedback.
@VR46Monster5 ай бұрын
I LOVE YOU! i was thinking about using my vape 18650s cause i have at least 100 of them.. this could be good use for them. Would you share how heavy the pack is ? my 5" uses 180gram 6s pack, i bet its around 300... which is.. like if i had gopro and whatever strapped to quad
@WhirlyBloke5 ай бұрын
My build will be a different weight from yours cos it uses different manufacturers batteries. Just weigh one of your batteries and multiply it by the number of cells you plan using and add 5% for wires etc. That'll give you the approximate weight of your pack. Thanks for watching.
@uscskierbro3 жыл бұрын
Epic build video! Can't wait to try it. Do you have to worry about the copper taps hitting the sides of the battery and causing a short? Also, small detail but aren't the batteries 65mm tall so why do you need 105mm tall heat shrink? Are you sure that's what size you used? About to purchase so just wanted to double check if I'm missing something. Thanks Whirly Bloke!
@WhirlyBloke3 жыл бұрын
Depends on the shrink ratio. You'll need to check the spec - it's tricky cos they usually specify % not absolute size.
@guthi44754 ай бұрын
good job ty u
@carsonlight_lapse63944 жыл бұрын
I think it's a cool project but to be honest I don't feel safe directly heating on top of li-ion batteries. I would rather get a battery box that can holds 18650s and call it a day, not only it could reduce the heat damaging the batteries, you can also swap battery once some battery died. I know that there are proper tools for making joints for batteries, but I also know that they're really expensive compare to plain old soldering. But anyway, great video and a great idea for making a battery pack. Just a personal comment tho.
@WhirlyBloke4 жыл бұрын
Yep only do this if you're 100% cpnfident. I've made at 20 of these over the last year. You need to be careful.
@mrb29174 жыл бұрын
Tons of people are making these packs for drills, power screwdrivers, lawn equipment, quads of course. It's not black magic.
@dividingbyzerofpv67484 жыл бұрын
Too much weight making a case. Potential for bad connections that limit current more than a properly soldered/tack welded joint. Crashes mean scattering cells everywhere potentially. Soldering them and securing them together solidly is the best option and likely the most light weight.
@english42923 жыл бұрын
Hello sir.i made the project but i have a problem.when i put the maximum power on the motors the red light of the receiver blink and shuts down ,do you have any idea why this happening?thank you for your time
@gasisthepastendoil2 ай бұрын
good for boats bikes
@TERBANGFPV3 жыл бұрын
hei.. lest say i already had 4pcs of murata 18650. and i want to make a 6s from it.. can i just buy 2pc new and combine it with my old 4pcs? is it safe? do i need to buy all new 6 pcs of murata to make one new 6s liion?
@mirkowaechter3 жыл бұрын
Doesn't the quad use a lot more discharge rate than 2C? You had with your first test 20 min flight time (other Video) which is on average already 3C (dunno how much capacity was left). Shouldn't this be bad for the battery?
@WhirlyBloke3 жыл бұрын
Not at all. The battery will only deliver what its capable of which is primarily limited by the internal resistance. Check the end of the video for the final voltages. You could run the Lithium Ion cells to a lower end voltage, but it affects the long term life.
@mirkowaechter3 жыл бұрын
@@WhirlyBloke Thanks for your reply. Are you sure about the "limited by internal resistance"? This sounds differently: electronics.stackexchange.com/a/16981
@Ryuuken243 жыл бұрын
Adding two cells or more in parallel gives you a bigger Ah.
@WhirlyBloke3 жыл бұрын
And lots more weight.
@gacha21423 жыл бұрын
Спасибо. Очень полезно.
@mirkowaechter3 жыл бұрын
What would be the effect if my nickel strips are not thick enough? Would they just get very hot? Or would also the voltage drop? I have a 4S2P pack with SONY Murata VTC6, which should be able do deliver 30A*2 continuously, but I have a fast voltage on only 15-20A.
@madforit96612 ай бұрын
what battery charger are you using to charge these please?
@PaulSokolov Жыл бұрын
Which jumper is better to use for assembling Molicell 21700 42A - 6S What thickness and width of the steel tape is suitable for peak loads of long-range quadcopters.
@WhirlyBloke Жыл бұрын
When assembling a battery pack for long-range quadcopters using Molicell 21700 42A - 6S cells, the most common choice for the battery contacts is copper or nickel-plated copper. Copper has a high electrical conductivity and is a good thermal conductor, which helps with heat dissipation during high-current discharge. Nickel plating can help to prevent corrosion and improve the contact resistance. It is important to note that the choice of metal for the battery contacts is only one factor to consider when designing a battery pack for quadcopters. Other important factors include the layout and arrangement of the cells, the type and quality of the insulation used, and the overall construction of the pack. It is recommended to consult with an experienced battery pack designer or engineer to ensure that your battery pack is safe, reliable, and optimized for the specific needs of your quadcopter.
@mikebarkasi64672 жыл бұрын
Great video..how would you connect / solder to make a larger pack , say like 10200mah ?
@WhirlyBloke2 жыл бұрын
Just add more cells in parallel to get the wattage you need.
@nikolaykostishen64024 жыл бұрын
Thanks!
@WhirlyBloke4 жыл бұрын
No problem!
@gregoryc87413 жыл бұрын
I was thinking of using inr2170 cells to make little 1s batteries for my mobula7 tinywhoop. Not really sure how many amps the whoop pulls though. The cells are 4800mah and rated for like 30a or something. Do you think it would be okay? On 1s, i doubt the whoop would draw too much, but idk
@WhirlyBloke3 жыл бұрын
Let me know how it goes.
@adrianador3 жыл бұрын
Hi I need help my jjrc 12 batter a toasted . wonder if any one done kit or set pack for this drone ? To fit in on package.. Please help
@mattsupertramp65063 жыл бұрын
How thick should my nickel strips be? I want to make a 4s2p with max 80A current
@nob0dy27_2 жыл бұрын
don't you think the maximum discharge rate of 6.8a is a bit too low? or is that not that important if you fly a bit more "calmly"?
@WhirlyBloke2 жыл бұрын
These are for long range cruising and not acro so the discharge C rating is not too much of a problem.
@avolarstudio4 жыл бұрын
Great video! I have a doubt about the balance leads. So the red goes to the positive and the black cables goes to each negative of the cells? In one of your cells there is a black balance lead just in the middle of the nicketl connection between positive and negative, could you explain me why? Thanks in advance !
@WhirlyBloke4 жыл бұрын
Thanks. Check my community page for wiring details kzbin.infocommunity
@hanshansen3844 жыл бұрын
Kindly glue cells together so that they do not pit against each other at the end where the 2 cells are not connected. This is to avoid breaking the thin insulation so that the cells short circuit.
@WhirlyBloke4 жыл бұрын
Fair point. But I've built about 20 of these packs and used glue and capon tape. They both work the same but the glue is messy and it's more difficult the replace a dud cell. Thanks for watching.
@100SteveB4 жыл бұрын
@@WhirlyBloke I put some thin strips of thin, but strong card between the cells. I once dropped a very tiny ball of molten solder that fell between two adjacent cells - very big sparks did happen. After seeing that i decided that relying on the two very thin battery wraps for insulation was not so wise, i would not trust them to not rub through in the event of a crash, or even dropping the pack on the floor. A few thin strips of card does not add much more than a couple of grams in the weight of the pack. It gives me peace of mind.
@flat-earther11 ай бұрын
do you think copper de-soldering wick is good for connecting the individual cells?
@WhirlyBloke11 ай бұрын
I don't think that's a good idea. You can buy nickel strip from Amazon and it's cheap amzn.to/3Ldeaet
@pattywaktdiy41753 жыл бұрын
Great video! Clarifying question that I haven't been able to find an answer to...fully charged, this will be at 25.2V, correct? (4.2V X 6 = 25.2V). Why are you using 3.8V to come up with labeling this battery at 22.8V? Just want to be sure I understand the math before I charge one of these at my own risk! Thank you!
@WhirlyBloke3 жыл бұрын
That's the nominal voltage.
@marvinfuhr3 жыл бұрын
Thanks for the video! But are 6.8Amps enough?
@WhirlyBloke3 жыл бұрын
For long range cruising, yes. For racing or hard acro, no.
@conhulio20009 ай бұрын
nice1 very good. what was the total weight of it in the end ?
@WhirlyBloke9 ай бұрын
Thanks. I can't remember the weight off hand, but it was around 300g.
@seeithappen12 жыл бұрын
So this battery pack will output more than 20V. Can you connect it directly or is a dc to dc convertor necessary between the battery pack and the drone ?
@WhirlyBloke2 жыл бұрын
25.2V fully charged, but I'm not sure why you'd want a dc to dc convertor.
@MrKeithw1244 жыл бұрын
with those batteries only able to pull 4.8amps was it ok to fly on such a big quad.
@WhirlyBloke4 жыл бұрын
Great for cruising. That's the whole point of it. Thanks for watching.
@yannickg69044 жыл бұрын
I am dumbfounded that some pilots give up and will not recommend this cell technology. KababFPV can even fly a 1S quadcopter on a single cell.
@WhirlyBloke4 жыл бұрын
Li-ion have a place. Not to be ignored.
@justneep31912 ай бұрын
C reting?
@coulsonrobert3 жыл бұрын
Great channel Whirly. Where do you buy your cells?
@WhirlyBloke3 жыл бұрын
Thanks. Sometimes Banggood, but mostly a small shop near me that supplies vaping stuff. They did me a great deal.
@erikev2 жыл бұрын
1. You can not solder on a 18650 cell. You will definitely damage the part of the battery under the - anode. (The + cathode is often spaced away from the chemicals, so possibly no damage). So do not do it. Use a point welder instead. The weld happens in milliseconds, and does not warm the inside of the battery. 2. Do NOT package the battery pack into insulating foam. If you draw high power, the battery will overheat, and be damaged.
@WhirlyBloke2 жыл бұрын
In general I agree with you, but this really only applies to mass produced packs. Spot welding will inject less heat into the cell, but my reflow solder approach is the best way if you don't own a welder. If you choose the right cells (these NCR18650's I used were not perfect cos they are higher internal resistance, but they were lying around and free) heat build up is minimal, especially if you let them cool properly after a flight before charging them.The massive benefits of thin foam is for damage protection - ally cases would be better though. I've been using building and using these type of packs for 3 years with no issues. I really should revisit this to cover my latest 21700 packs which are leagues better.
@ficosk87 ай бұрын
@@WhirlyBloke nice! If the curent isn´t to high and the packs gets only one flight probably heat isn´t a problem. I´ll mybe try someday a pack with those 21700 for 6S or something similar. I have seen that peak current can be as far as twice the specs when cooling properly each cell using 3D printed frames. But for that you need a 3D printer xD...
@WhirlyBloke7 ай бұрын
@@ficosk8 Agreed. The 21700 is a better choice these days and it's what I use on all my long range pack now.
@ficosk87 ай бұрын
@@WhirlyBloke 🤩 super 👌🏼 and how much current are you getting out of your cells? Around 35A or more?
@flat-earther11 ай бұрын
4:13 what thickness copper strip do you recommend? I want to make 6S pack using 21700 cells
@WhirlyBloke11 ай бұрын
I've used that nickel strip from Amazon on my latest 21700 packs. Works fine, but I am using a cheap spot welder now cos I make lots of them and it's much quicker.
@izhal754 жыл бұрын
So as a newby should I even have to consider getting lipos? Im expecting my first fpv to arrive in a week from China and I havent bought any batteries yet. Im leaning more towards cruising , not racing...
@CorrexPoE4 жыл бұрын
Liion are really just for cruising, if you want to flips or some punches you need to go with a lipo. Do you have a quad yet? Cruising normally we use a 7inch prop frame and for Freestyle or racing 5inch or less. It really depends on what you want from your quad.
@TheRoadtoGonzo3 жыл бұрын
Do you have to physically balance the pack on your quads frame? Asking as I built a pack and my quad was drifting backwards a bit
@WhirlyBloke3 жыл бұрын
Yes. You need to make sure it's center of gravity. That's usually in the center of the quad.
@glialka13 жыл бұрын
I'm designing a 7-inch machine. I make a pack like this too. No need to put protective electronics in it?
@WhirlyBloke3 жыл бұрын
No. It's fast discharge and you'll be charging with a balance charger. Looking after your batteries in FPV is very manual process.
@kcpab2 жыл бұрын
This cells only have 2c of discharge rate, why you use this?
@izhal754 жыл бұрын
Nice pack. Wonder if 26650 batteries will make more powerful ones...
@WhirlyBloke4 жыл бұрын
They are heavier. Twice the capacity, doesn't give you twice the flight time cos they are heavier. It doesn't scale like that.
@izhal754 жыл бұрын
@@WhirlyBloke I see. Thank you.
@glialka13 жыл бұрын
Are the cells not damaged by soldering? Is zinc tape not good? And with a spot welder? thanks for the reply .
@WhirlyBloke3 жыл бұрын
They won't get damaged if you solder quickly. I explain all this in detail in the video.
@rayyanislam32793 жыл бұрын
Are there any heat/cooling issues with this pack when you fly it for extended periods of time? Also are the balance leads needed? (trying to save weight)
@WhirlyBloke3 жыл бұрын
There are no overheating issues. Try to to Sony VTC6 is equivalent 18650 cells if you can. More expensive, but better power per dollar.
@srqcrna4 жыл бұрын
Question, when you charge: Select Lion, 4s, balance charge (since the capacity of the 4s is 3400 mAH) why isn't the current set at 3.4, you said 1.5. Is the charge rate different for Lion compared to Lipo because Lion can not discharge and recharge fast like Lipos can?
@WhirlyBloke4 жыл бұрын
You have to read the manufactures spec. The NCR16850 recommended charge current is 1.6A and the end point is 4.2v.
@houseofquad22604 жыл бұрын
Hi. I wanted to ask a quick question regarding Amp rating on 18650 cells. I'm looking at the Sony VTC6 3000mah 20A. However there is a Sony VTC5A 2500mah 25A, they both weigh the same (give or take a gram). Do you think the higher Amp rating is worth the drop in mah ? Let's say in a situation at longer range where you need a sudden punch out to recover video, do you think the extra 5A on the VTC5A would really make that much difference ? I understand these packs aren't for aggressive punch outs, i'm just curious if that extra power available would help. Thanks.
@WhirlyBloke4 жыл бұрын
VTC6 cells are probably the best balance of internal resistance and power available.
@houseofquad22604 жыл бұрын
@@WhirlyBloke Excellent. I was hoping the VTC6 was the 'winner'. Based purely, of course, on more mah. Thanks.
@Mr781903 жыл бұрын
Hello ! I see a lot of packs that are built without BMS. In your case, if one of the cells were to discharge faster than another, how would it be detected? Isn't there a risk of explosion without BMS to check the voltage during the flight? Thank you in advance for your answer
@WhirlyBloke3 жыл бұрын
A BMS is not required in this type of RC application. If the overall pack voltage drops below and average of 3.3V or whatever is set in the flight controller, the quad will prompt to land and eventually failsafe. Also, these are charged using a balance charger and it's usual to check cell voltages and internal resistance before each charge cycle, so you're monitoring for any problems. A BMS is normal required for applications like electric bikes etc
@Mr781903 жыл бұрын
@@WhirlyBloke I see. Thank you very much for this very quick response And thank you for this quality content, good luck for the future.
@anupr35923 жыл бұрын
Don't it heat ?? Or is the temprature their lower compared to mine with 30°C AVERAGE daily. I ordered the same battery and they heat up real fast, just gave me 4 mins of flight time until it heated up and reaiatance kicked in and drone dropped out. But voltage comes back to normal after some timw
@WhirlyBloke3 жыл бұрын
I don't have any heat problems with any of my packs. Try Sony VTC 6 18650 cells. They work really well.
@anupr35923 жыл бұрын
What is a Ampere of your esc ? I think because I use 30A esc maybe that is the problem.
@GregQuillen4 жыл бұрын
Thought balance leads last wire ground.. i wish I could take 1s batteries and make me a hv 4s 300mah
@WhirlyBloke4 жыл бұрын
This is 6 x 1s batteries that is exactly that.
@MdParvez-dq6dq3 жыл бұрын
How many amperes is it? How many kilometers will an electric bicycle run with it?
@WhirlyBloke3 жыл бұрын
Not for use on an electric bike I'm afraid.
@The_Le_Page_Workshop3 жыл бұрын
Kapton! other than that this was brilliant
@WhirlyBloke3 жыл бұрын
Trouble with my worms.😃
@benwilson22973 жыл бұрын
I have just bought a set of Samsung nr18650s with 1500 milliamps. Will the charge rate still be 1.6 amps? Thanks Ben
@WhirlyBloke3 жыл бұрын
You need to look at the specs for that cell. Each manufacturer is slightly different.
@benwilson22973 жыл бұрын
Thankyou il have a look
@AkshayTravelFilms3 жыл бұрын
What is its discharge rate? for each cell.. or complete pack...thanks for video :)
@WhirlyBloke3 жыл бұрын
Like all Lithium Ion cells the NCR18650 has nowhere near the same C rating as LiPos. These cells are specs at 2C, but other 18650 cells are much better - like the Sony VTC6.
@AkshayTravelFilms3 жыл бұрын
@@WhirlyBloke Thanks :) need to get higher C battery
@WhirlyBloke3 жыл бұрын
@@AkshayTravelFilmsDefinitely for anything other than light acro or long range cruising, Lipos are the way to go. But if you want long range/duration then Lithium Ion, especially 6S is the way to go. And you you need way less C rating than you think. Check out these videos that are using 4S Lithium Ion packs kzbin.info/www/bejne/gqK3qWebnpiFntk kzbin.info/www/bejne/pZ_CimhtptCtb5Y
@AkshayTravelFilms3 жыл бұрын
@@WhirlyBloke Thanks buddy... You are gem❤️
@benwilson22973 жыл бұрын
Do the batteries need to be completely flat before soldering them?
@WhirlyBloke3 жыл бұрын
No. Just be careful not to sort anything out. Only do this if you're comfortable with it.
@sweetcollegegirl9603 жыл бұрын
Hi bro I have a quadcopter With spec Dji f450 Frame Apm2.8 Fc 920kv motors 30a simonk esc 1045 propellers M8n gps Fsi6 tx and and rx If I make a battery pack like u will it work for me pls reply The nasty lipo are wasting my money as i just entered into the hobby iam nit having that much money with me Love from india
@johgude50452 жыл бұрын
soldering 18650s is a very bad idea, they suffer from the heat at the negative pole. get hands on a battery welder, these are cheap these days
@MxabierM4 жыл бұрын
Hi Whirly one question. What are the thickness and width of the nickel strip? Thank you
@WhirlyBloke4 жыл бұрын
It's 0.2mm. I salvaged this from an old MacBook power supply, but you can use anything similar.
@straycats99342 жыл бұрын
is it rechargeable? why did you not put bms on it?
@WhirlyBloke2 жыл бұрын
It doesn't need a BMS if you charge with a balance charger.
@TheRoadtoGonzo3 жыл бұрын
What voltage do you typically discharge to for individual 18650 cells 3.0v?
@WhirlyBloke3 жыл бұрын
Never below 3v. I usually try to keep to 3 - 3.3v to be kind to the batteries.
@vazami3 жыл бұрын
You just charge as a lipo 3400mah 1.6a?
@WhirlyBloke3 жыл бұрын
Correct. If you check the manufactures spec you'll find the end voltage is 4.2v and the optimum charge current is 1.6 amps.
@virpz6 ай бұрын
Sorry, there are too many things that can go bad with that technique. Edit: But if you are doing it with what you have on hand and during a lockdown then that's one way around it. 🤓 1- The reason nobody does it that way is that you can easily get a cold solder joint. To be sure you are not getting a cold joint you need to submit the battery to a extended period of heating. 2- You can easily damage the cells insulator and get short. 3- By not having glue between cells you will be putting all mechanical stress into the solder joints.
@WhirlyBloke6 ай бұрын
I agree with everything thing you're saying. That's why I keep saying you need to know what you're doing. It looks easy, but it's not and there's plenty to go wrong. Spot welding is the best, and I've built loads of pack like that. But this soldered pack I covered in the video, is still going strong after many, many flights. The whole point was, it was using some stuff I had lying around during lockdown.
@virpz6 ай бұрын
@@WhirlyBloke That's pretty fair. Everybody been there doing things the hard way and the lockdown sure did put us all under alot of pressure.
@CorrexPoE4 жыл бұрын
Can you have a look on Liitokala batteries? I think of buying Liitokala 21700 cells 4000mah 10C discharge, these cells weight 67g. sounds for me like a good choice for a 4S 4000mah liion battery for a 7inch? Or the 5000mah 21700 with 5C discharge rate for also 67g.. Otherwise the NCR18650B from Liitokala are 4300mah weight 48g and 2C discharge Do you have any experience with Liitokala?
@WhirlyBloke4 жыл бұрын
They're not available in the UK. Feel free to send me some and I'll take a look.
@CorrexPoE4 жыл бұрын
@@WhirlyBloke here in Italy neither.. Need to order them from china, will take a few months. But looking at the characterestics which would you think are the best choice?
@Sergei750003 жыл бұрын
@@CorrexPoE Liitokala 21700 ( yellow color) are 15 Amps , i used 4s 4000 mah for my 5 inch for cruise flight of 15 mns
@benwilson22973 жыл бұрын
Hi how would I go about charging 6s with 5000mah? Thanks
@WhirlyBloke3 жыл бұрын
Recommended spec is 1.6A and the pack is 3400mAh so it's about 0.5C charge.
@Dashone9310 ай бұрын
What is the lowest amp battery u can use
@WhirlyBloke9 ай бұрын
Use whatever you need. It's about what voltage and current you require for your application. Remember V=IR. Thanks for the feedback.